One of the hobbies I had to put aside when I got into these darn bikes was RC. I've painted a few planes with Rustolem with good results, and I think hot nitromethane has got to be worse on paint than gas.I used regular rattlecan Krylon with good results. Let it dry for 48 hours before you get fuel on it.
The trick was to let the paint cure before exposing it to the fuel, in the case of ROem it was two weeks. After that it was fine.